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1.1 This guide describes the characteristics and operating principles of purging and sampling devices available for use in ground-water monitoring wells and provides criteria for selecting appropriate devices for specific applications. The selected device(s) should be capable of purging the well and providing valid representative samples of ground water and any included dissolved constituents. The scope does not include procedures for purging or collecting samples from monitoring wells, sampling devices for non-aqueous phase liquids, diffusion-type sampling devices or sampling from devices other than monitoring wells.
1.2 This guide reviews many of the most commonly used devices for purging and sampling ground-water monitoring wells. The practitioner must make every effort to ensure that the purging and sampling methods used, whether or not they are addressed in this guide, are adequate to satisfy the monitoring objectives at each site.
1.3 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgement. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of the many unique aspects of a project. The word "Standard" in the title of this document means only that the document has been approved through the ASTM consensus process.
1.4 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
D5088 Practice for Decontamination of Field Equipment Used at Waste Sites
D6452 Guide for Purging Methods for Wells Used for Groundwater Quality Investigations
ICS Number Code 13.060.10 (Water of natural resources); 19.020 (Test conditions and procedures in general)
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ASTM D6634-01, Standard Guide for the Selection of Purging and Sampling Devices for Ground-Water Monitoring Wells, ASTM International, West Conshohocken, PA, 2001, www.astm.orgBack to Top